test: add basic test for multi-channel opening+closing
test: add basic test for multi-channel opening+closing


bryanvu/lnd,ddustin/lnd,LightningNetwork/lnd,bryanvu/lnd,LightningNetwork/lnd,AndrewSamokhvalov/lnd,AndrewSamokhvalov/lnd,ddustin/lnd,aakselrod/lnd,aakselrod/lnd